CollegeHigh School / Physics

Light Intensity versus Distance

The relative light intensity versus distance from a point light source is plotted. As the Light Sensor is moved by hand, the string attached to the Light Sensor that passes over the Rotary Motion Sensor pulley to a hanging mass causes the pulley to rotate, measuring the position. The experiment is repeated with an extended source.

Various curves are fitted to the data to see which fits better.


Student Files

49_Light_Intensity_vs_Distance.cap 7.14 MB
49_Light_Intensity_vs_Distance.docx 582.33 KB
49_Light_Intensity_vs_Distance.pdf 739.94 KB

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Source: Lab #49

Universal 550 Physics Experiment Manual

Light Intensity versus Distance